Ventilation apparatus for rooms of a building



I Feb. 6, 1968 A. ERFELING 3,367,258

VENTILATION APPARATUSFOR ROOMS OF A BUILDING Filed April 12, 1967 5 Sheets-Sheet l A. ERFELING 3,367,258

VENTILATION APPARATUS FOR ROOMS OF A BUILDING Feb. 6, 1968 3 Sheets-Sheet 2 Filed April 12 1967 FIGS.

IN ENTOR QMJ ATTORNEYS Feb. 6, 1968 A. ERFELING 3,

VENTILATION APPARATUS FOR ROOMS OF A BUILDING Filed April 12, 196'? 3 Sheets-Sheet 5 United States Patent 3,367,258 VENTILATION APPARATUS FOR ROOMS OF A BUILDING Arthur Erfeling, Altenwalde, Germany, assignor to L0]:-

mann-Apparatebau K.G., Cuxhaven, Germany Filed Apr. 12, 1967, Ser. No. 630,315

Claims priority, application Germany, Dec. 20, 1966,

L 43,657; Feb. 15, 1967, L 55,748 Claims. (Cl. 9833) ABSTRACT OF THE DISCLOSURE Rooms, especially stables are provided with a vertical used-air duct connected at its upper end to a horizontal used-air duct extending to the outside air. A horizontal fresh-air duct is arranged above the horizontal used-air duct. Both horizontal ducts are connected by a connection duct. An axial-blow fan is arranged in the horizontal used-air duct within the range of the wall. A double flap can be adjusted bet-ween two end positions, in which either both horizontal ducts are closed while the connection duct is open (circulation) or the connection duct is closed while both horizontal ducts are open (fresh-air supply).

Background of the invention The invention relates to a ventilation apparatus with the arrangement of a ventilator adapted to be driven by motor, for the rooms of a building, particularly of a stable, said apparatus comprising an axial-flow fan drawing in the used air from the room of the building via a vertically downwardly extending used-air draw-in duct, and delivering it to an outlet duct extending essentially horizontally outwardly which is arranged below a likewise outwardly extending fresh-air duct through which the fresh-air is drawn-in into the room by a pressure below atmospheric created by the axial-flow fan in the room of the building.

It is known in connection with such venting arrangements to connect the fresh-air duct and the used-air duct with each other by a connecting duct and to control the fresh-air duct, the used-air duct and the connecting duct by means of a double flap formed as a double-armed lever via intermediate positions in such a manner that when closing the connecting duct by the one flap half both the fresh-air duct and the horizontal used air channel are fully opened while in the other end position of the throttle flap said flap half closes the horizontal used-air duct while opening the connection channel, and the other flap half closes the fresh-air duct. In the case of the known arrangements of this kind the axial-blow fan is arranged in the vertical used-air duct with a vertical axis of rotation. In this arrangement, then a favourable position for the throttle flap was resulting, it is true, however, there might be the danger that the axial-blow fan at the bottom of the housing disposed relatively near to the drawin opening, in particular, directly adjacent the draw-in opening, was effective to cause draught phenomena. Added to this is the fact that the cross sectional area of the vertical used-air duct was governed by the diameter of the fan. The dimensions of the used-air duct therefore constituted a hindrance in quite a number of cases of requirement. What was especially troublesome was the relatively large dimensions of the used-air duct in buildings with stationary installations, for instance in stables with fowl batteries or with boxes.

As a rule, such venting arrangements are in addition provided with speed adjustable fans, the speed of the fans being especially adjusted in dependence upon the temperature of the interior of the room. In this connection, another disadvantage may result which has an unfavourable influence on the venting stream. In the case of a low delivery output, and thus a low speed of the fan, the inflow speed of the air will decrease, so that the air stream drawn-in will very soon approach the bottom area in a short curved path. For the same reasons, i.e. with relatively low delivery output of the fan, due to the low amounts of flow, the through-flow also did not cover the entire width of the outlet nozzle but preferably only the center thereof or, in case of a small fresh air proportion due to the rotary effect of the fan, also took place only in one corner of the nozzle member provided for the outflowing air. Finally, in many cases, as a result of the fact that the air exit and air inlet openings were lying closely side by side outside the building, it was not always possible to avoid contamination of the entering air by floating particles from the outgoing air.

Summary of invention The invention is concerned with the problem of improving the flow and distribution of the air of a ventilation apparatus within the room of the building and to take care that when drawing-in fresh air it is practically ensured that the amount of fresh air drawn-in is not contaminated by the outgoing used air.

This problem is to be solved while securing the property that the complete venting equipment is adapted to be supplied subdivided into units for assembly, which may be assembled in a simple manner in the site.

The problem is solved in that the axial-blow fan is arranged in that part of the horizontal used-air duct which is located about in the range of the wall of the building. In this manner, the fan is located about midway between the draw-in opening of the used air draw-in duct and the air discharge opening of the nozzle member, so that draught phenomena are largely avoided and the air drawn-in by the fan without any draught phenomena occurring, is uniformly distributed at the air discharge opening of the nozzle member. In this manner the used air draw-in duct may also be designed to have extremely small dimensions and may in particular be designed to be very low, so that the assembly thereof also in such buildings which are provided with stationary installations does not cause any difliculties.

In a preferred embodiment of the invention, the connecting duct consists of an opening which is provided in the partition wall between the fresh-air duct and the horizontal used air duct. It is recommendable to arrange the bearing of the throttle flap on that side of the connection duct which is averted from the housing wall. In this manner one may have the connection duct start directly adjacent the wall of the building and achieves in spite of this a d accessibility to the bearing of the throttle flap.

The invention is furthermore improved by the feature that the air discharge opening of the nozzle member is closed by means of a flap retained in its position by means of a weight or by means of a spring, with the axis of rotation of the flap disposed on the lower edge thereof. In this way, an essentially uniform overpressure is maintained in the nozzle member. The smaller the amount of air respectively conveyed by the fan, the less will the flap open and the more will the amount of air leaving the opening of the nozzle member be deflected upwardly.

Furthermore, in accordance with the invention, the nozzle member is provided with several air baflies which contribute to improve the uniformity of the amount of air respectively flowing towards the nozzle member over the entire cross sectional area and the entire width thereof.

The invention is furthermore improved by the fact that the fresh air draw-in opening is averted from the blowout opening. While the blow-out duct and the blow-out opening are facing upwardly and away from the wall of J the building, the fresh air inlet opening is facing downwardly and towards the wall of the building. In this way, the amount of fresh air drawn-in is not only not subjected to being mixed with the outgoing used air but is protected from outer influences such as wind and heavy rain.

Further improvements and suitable developments of the invention are explained by way of the attached drawing which shows one embodiment of the invention in a simplified manner. In the drawing,

FIG. 1 shows a sectional view taken on the subject matter of the invention with the throttle flap open,

FIG. 2 shows a sectional view similar to FIG. 1, however, with the throttle flap closed,

FIG. 3 shows a sectional view taken on the outflow opening of the nozzle with the pendulum flap closed,

FIG. 4 is a perspective, partially broken away view of the subject matter of the application taken from outside, with the throttle flap open and the pendulum flap closed, the wall of the housing being eliminated,

FIG. 5 is a perspective view of the air outlet opening of the nozzle with the pendulum flap open,

FIG. 6 is an exploded representation of the subject matter of the invention, simultaneously illustrating the manner in which the individual parts of the venting equipment are made in detail and assembled in the site.

In the figures, 1 designates the room of the building and 2 designates a wall of the building. The venting equipment generally designated with 3 essentially consists of a center or main box 5 which is pushed into an opening 6 of the wall of the building and which serves to support an axial-blow fan 11 and a double flap 20. On the inwardly pointing side of this center box 5, a draw-in duct box 4 and a nozzle member 8 are fastened in a manner described in more detail below, while on the outwardly facing side of the center box 5 there is fastened in some suitable manner an outer box 28 essentially serving to form an air inlet opening 14. The individual boxes preferably consist of sheet metal but may also be made of synthetic resin, in particular, glass fiber reinforced synthetic resin.

The sheet metal box 5 comprises a short horizontal partition wall 29 facing towards the room 1 of the building, above which the nozzle member 8 is fastened to the center box 5, said nozzle member serving to discharge the fresh air or return air into the room 1 of the building and terminating into an opening 9. Below the partition wall 29, the draw-in duct box 4 is fastened at the center box 5.

On its side facing towards the room 1 of the housing, the center box 5 is provided with two flanges 30, 31 extending in parallel with respect to each other. The flange 30 lies close against the wall 2 of the building from inside; the flange 31 serves to fasten the nozzle member 8 and the draw-in duct box 4. The box 4 forms a usedair, draw-in duct 7 the upper end. of which terminates in a horizontal used-air duct 10 formed by the center box 5 in which the axial fan is fitted with the axis of rotation thereof extending essentially horizontally. The axial-blow fan, accordingly, is supported in the region of the wall 2 of the building.

The outer box 28 is provided with a horizontally extending used-air pressure duct 12 constituting a continuation of the horizontal duct 10 of the center box 5. At the end of the used-air pressure duct 12 there is provided a deflection plate 13 which deflects the used-air leaving via the opening 14, upwardly.

Above the outer box 28 there is provided also a horizontal fresh-air duct 15 by means of a mountable plate 32, said fresh air duct being connected with the outer atmosphere via two openings 16 blocked by a grid. The two fresh air openings in FIGS. 1 and 2 are dfsposed vertically with respect to the plane of the drawing and are recognizable in FIGS. 4 and 6. For this purpose, the

mountable plate 32 extends on both sides beyond the outer box 28.

The used-air pressure duct 10 and the fresh-air duct 15 are interconnected by means of a connecting duct 17 which begins immediately behind the fan 11 and the short partition wall 29 and, in the example of embodiment, consists only of an opening provided in the partition wall 29 between the used-air pressure duct 12 and the freshair duct 15.

At the end of the connection opening 17 which faces away from the wall 2 of the building, there is situated in the center box 5 the bearing 19 for a double flap generally referenced by 20 and consisting of two flap halves 21 and 22.

In tlie representation of FIG. 1, the double flap 20 is shown. in its one end position. In this end position, the connection opening 17 is blocked by the flap half 21. The flap half 22 lies close to the partition wall 18 and is supported on an inclined portion of the partition wall 29. In this end position of the double flap 20, the used-air presure ducts 12, 10 and the fresh-air inlet duct 15 are fully open.

FIG. 2 shows the other end position of the double flap 20. In this end position, the fresh-air inlet duct 15 is blocked by the double flap half 21 while the double flap half 22 closes the used-air pressure duct 10, 12. In this position, the entire amount of the used-air which has been sucked-off from the room 1 by the axial-blow fan 11, is returned via the nozzle member 8 and the opening 9 into the room of the building.

It may be recognized particularly from FIGS. 3 and 5 that the opening 9 of the nozzle member 9 is closed by a pendulum flap 24 pivotally supported at its lower edge and provided with a counter weight 23. The pendulum flap takes care that a uniform overpressure is maintained in the nozzle member 8 and the outflowing air presses the pendulum flap out of its vertical position against the effect of the weight 23, the extended upper cover plate 25 of the nozzle member 8 preventing the air from being deflected upwardly by the inclined pendulum flap 24. A lateral deviation of the air flow is prevented by the extended side walls 26 of the nozzle member 8.

The nozzle member 8 is furthermore provided with several vertically arranged baflles 27 (FIGS. 4 and 5) which are beginning at the merging point of the freshair duct 15 with the nozzle member 8, i.e., in the inner region of the wall 2 of the building and, with spaced apart horizontal axes, are extending approximately in parallel with the air flow to the outlet opening 9 of the nozzle member 8.

I claim:

1. Ventilation apparatus for rooms of ticularly stables,

comprising a used-air, draw-in duct arranged vertically in the room and facing downwardly,

a used-air pressure duct connected to the draw-in duct and extending essentially horizontally and outwardly through the wall of the building,

a fresh-air duct arranged above the used-air pressure duct and extending outwardly through the wall of the building,

a connection duct connecting the said pressure duct with said fresh-air duct,

a double flap formed like a two-armed lever and adapted to be pivoted between two end positions, in the one end position the connection duct being closed by the one half of the flap and both the pressure duct and the fresh-air duct being fully opened and in the other end position the connection duct being opened and the fresh-air duct being closed by said flap half and the used-air pressure duct being closed by the other flap half, and

an axial-blow fan adapted to be driven by a motor and arranged in that part of the horizontal used-air presbuildings, parsure duct which is situated approximately within the range of the wall of the building.

2. The apparatus of claim 1, wherein the connection duct consists of an opening which is provided in a partition wall arranged between the fresh-air duct and the used-air duct.

3. The apparatus of claim 2, wherein the bearing of the double flap is disposed on that side of the connection duct which faces away from the wall of the building.

4. The apparatus of claim 1, wherein a nozzle member is arranged at the inside of the fresh-air duct and the discharge opening of the nozzle member is closed by means of a flap the revolution axis of which is disposed at its lower edge.

5. The apparatus of claim 4, wherein the flap is kept in its closed position by means of a weight.

6. The apparatus of claim 4, wherein the flap is kept in its closed position by means of a spring.

7. The apparatus of claim 4, wherein the nozzle member is provided with several bafiles in the interior thereof. 20

8. The apparatus of claim 1, wherein the inlet openings of the fresh-air duct are facing away from the flowout opening of the used-air pressure duct.

9. The apparatus of claim 1, wherein it is composed of several box units and a center box which serves to support the axial-blow fan and the double flap.

10. The apparatus of claim 9, wherein the center box is adapted to be pushed into an opening of the wall of the building and the other box units are adapted to be fastened at the center box.

References Cited UNITED STATES PATENTS 2,212,050 8/1940 Samuelson et al. 9833 2,700,331 1/1955 Miller 9833 3,221,632 12/1965 Copp 9833 3,302,548 2/1967 Kohlmeyer 9833 LLOYD L. KING, Primary Examiner. 

